public void UpdateBoard(Disk[,] boardState)
{
    // Loop through the board state (2D array) and place pieces
    for (int row = 0; row < 8; row++)
    {
        for (int column = 0; column < 8; column++)
        {
            var tile = BoardGrid.Children[row * 8 + column] as Border; // Get the corresponding tile

            // Find the Ellipse inside the Border
            var ellipse = tile?.Child as Ellipse;

            if (boardState[row, column] == Disk.White)
            {
                ellipse.Fill = Brushes.White;
            }
            else if (boardState[row, column] == Disk.Black)
            {
                ellipse.Fill = Brushes.Black;
            }
            else
            {
                ellipse.Fill = Brushes.Transparent; // Empty cell
            }
        }
    }
}

public void UpdateBoard(Disk[,] boardState)
{
    // Loop through the board state (2D array) and place pieces
    for (int row = 0; row < 8; row++)
    {
        for (int column = 0; column < 8; column++)
        {
            var tile = BoardGrid.Children[row * 8 + column] as Border; // Get the corresponding tile

            // Find the Ellipse inside the Border
            var ellipse = tile?.Child as Ellipse;

            if (boardState[row, column] == Disk.White)
            {
                ellipse.Fill = Brushes.White;
            }
            else if (boardState[row, column] == Disk.Black)
            {
                ellipse.Fill = Brushes.Black;
            }
            else
            {
                ellipse.Fill = Brushes.Transparent; // Empty cell
            }
        }
    }
}